Living characteristics of rare and endangered species —Davidia involucrata

Abstract

Dovetree (Davidia involucrate), one of the first-class protective plants in China, is a relic species of paleotropical kingdom in Tertiary period, belonging toDavidiaceae with a single genus. In recent years, the increase of regional developing projects has led to a sharp decrease of this ancient and rare plant in naturally distributed habitats and natural population. In this paper, the biological and ecological characteristics of Dovetree were described, and the geographically distributed condition of this species in different geologic periods as well as the major reasons for dynamic changes of its population were systematically analyzed in accordance with field researches and references. The investigations conducted in different years by setting up standard sample plots showed that the population number of Dovetree increased yearly in the areas without human interference but decreased yearly in the areas with human interference. With the increase of population density and human activities decreased as the logarithmic curve:Y=−100.7ln(x)+178.09, and it has turned from a dominant population into an endangered population. Based on the former and present studies on Dovetree, some protection strategies were put foreword for protecting this ancient and rare species.

Keywords

Davidia involucrate / Dovetree / Geographical Distribution / Biological Characteristics / Protection Policy / S718.4 / A / 1007-662X(2004)01-0039-06

References

[1] Compiling Group of Yunnan Vegetation Yunnan vegetation [M], 1987 Beijing: Science Press 28 46 (in Chinese

[2] Conservancy of Wolong Natural Conservation Area Wolong vegetation and plant resources [M], 1987 Chengdu: Sichuan Science and Technology Press 81 82 (in Chinese)

[3] Editorial Committee of Chinese Vegetation Chinese vegetation [M], 1980 Beijing: Science Press 281 299 (in Chinese)

[4] Editorial Committee of Propagation Technology of Rare and Endangered Tree Species The propagation technology of rare and endangered tree species [M], 1992 Beijing: China Forestry Publishing House 23 41 (in Chinese)

[5] Flora Editorial Committee of Chinese Academy of Science China Flora [M], 1983 Beijing: Science Press 157 158 (in Chinese)

[6] Liguo Fu Red book of Chinese plants, 1992 First Edition Beijing: Science Press 474 475 (in Chinese)

[7] Group of Sichuan Vegetation Sichuan vegetation [M], 1980 Chengdu: People's Press of Sichuan 38 52 (in Chinese)

[8] Jinsheng He, Jie Lin, Weille Chen The current of rare and endangered speciesDavidia involucrata and the preserving strategies [J]. Chinese Biodiversity, 1995, 3(4): 213-221. (in Chinese)

[9] Jian Jiao The quantitative characters ofDavidia involucrata communities in Wen County of Gansu Province [J]. Journal of Gansu Agricultural University, 1995, 30(2): 189-193.

[10] Bo Li, Daolin Yuan Dovetree community of Mt. Seven-sister in Western Hubei & its protective strategies [J]. Journal of Central China Normal University, 1990, 24(3): 323-334. (in Chinese)

[11] Bo Li, Daolin Yuan, Jide Ban Dovetree community of Mt. Seven sister in Western Hubei & its protective strategies [J]. Environmental Science and Technology, 1990, 50: 45-48. (in Chinese)

[12] Junqing Li, Xiurong Lian Morphology and biological characteristics ofDavidia involucrate [J]. Journal of Beijing Forestry University, 1994, 16(4): 33-36. (in Chinese)

[13] Xijun Liu Research on water regime in Dovetree's seedling period [J]. Journal of Plants in Northwest, 1987, 7(4): 270-275. (in Chinese)

[14] Plant Research of Chinese Academy of Science Rare and endangered plants in China, 1989 First Edition Shanghai: Shanghai Education Press 236 237 (in Chinese)

[15] Chengjing Qi Vegetables in Hunan Province [M], 1990 Changsha: Hunan Science Press 132 134 (in Chinese)

[16] Chengzhong Shi First investigating report on Dovetree of Balshuijiang Natural Conservation Area in Gansu Province [J]. Gansu Forestry Science and Technology, 1986, 6(4): 26-28. (in Chinese)

[17] Bin Sun, Bonian Li Observation of the leaf structure of twoDavidia Involucrata Baill. Species [J]. Acta Botanica Boreal.-Occident. Sinica, 1993, 13(3): 198-202. (in Chinese)

[18] Jinchuan Tao Dovetree's geographic distribution and introduce [J]. Journal of Zhejiang Forestry College, 1986, 1(1): 30-35. (in Chinese)

[19] Xianpu Wang The key area of biodiversity in China: Current Status of Protection Strategies of Biodiversity in China [M], 1993 Beijing: China Science Press 164 204 (in Chinese)

[20] Xianpu Wang, Junqing Li, Jiaxun Zhang Bioecological characteristics and cultivation of the Dovetree in China [J]. Guangxi Plants, 1995, 15(4): 347-353. (in Chinese)

[21] Yexin Wu, Xuegang Zhao Species protection in Hubei Province [J]. Environmental Science and Technology, 1990, 48: 6-8. (in Chinese)

[22] Zhengyi Wu On zonal problem of flora in China [J]. Research on Yunnan Plants, 1979, 1(1): 1-22. (in Chinese)

[23] Zhongfu Wu National first-class protection plant—Dovetree [J]. Yunnan Forestry, 1985, 4: 21-23. (in Chinese)

[24] Guiqiong Xiang, Funsun Lu Study on chemical components ofDavidia involucrata Baill. native to China [J]. Acta Botanica Sinica, 1989, 31(7): 540-543. (in Chinese)

[25] Yeqin Yang Beatiful Chinese Dovetree—Davidia involucrata Newsletter of Forestry Science and Technology, 1980, 9: 17-18.

[26] Yeqin Yang, Youyuan Xu A Preliminary Study On The Ecological Characteristics of Dovetree in Guizhou Province Scientia Silvae Sinicae, 1986, 22(4): 426-430. (in Chinese)

[27] Jiaxun Zhang Chinese Dovetree—Davidia involucrate [J]. Journal of Plants, 1988, 1: 33-34. (in Chinese)

[28] Jiaxun Zhang, Junqing Li Natural distribution ofDavidia involucrata and introduction analysis Journal of Beijing Forestry University, 1995, 17(1): 25-30. (in Chinese)

[29] Jiaxun Zhang, Junqing Li Studies of the Chinese Dovetree propagation and cultivation techniques [J]. Journal of Beijing Forestry University, 1995, 17(3): 24-29. (in Chinese)

[30] Qinghua Zhang Investigation of Dovetree's natural distribution [C] The Propagation Technology of Rare and Endangered Tree Species, 1992 Beijing: China Forestry Publishing House 25 30 (in Chinese)

[31] Qinghua Zhang Study on Dovetree's propagation and cultivation technology [C] The Propagation Technology of Rare and Endangered Tree Species, 1992 Beijing: China Forestry Publishing House 31 35 (in Chinese)

[32] Zhong Zheng, Tianquan Xu, Jinfa Zhang Rare plants and their general distribution dituation in Hubei Province [J]. Environmental Science and Technology, 1990, 51: 40-47. (in Chinese)

[33] Zhangcheng Zhong, Zisheng Qin Preliminary studies on the phytocoenological features of theDavidia involucrata forests in Wolong Region of Sichuan Province [J]. Acta Phytoecologica ET Geobotanica Sinica, 1984, 8(4): 254-263. (in Chinese)